PepEvolutionIGF-1 LR3
Long R3 IGF-1
A real anabolic mechanism wrapped in near-zero human safety data and the hardest-to-verify sourcing in the catalog.
Verdict — F · Avoid / High-Risk
A real anabolic mechanism, but near-zero human safety data, a genuine cell-proliferation and hypoglycemia risk, and the hardest-to-verify sourcing in the catalog. Avoid for almost everyone.
Overview
IGF-1 LR3 is a modified insulin-like growth factor with a long half-life and potent anabolic signaling. It also carries a genuine cell-proliferation and hypoglycemia risk, almost no human safety data, and is a fragile protein that labs struggle to verify — making clean sourcing exceptionally difficult.
PepScore Breakdown — the four axes
Evidence
35% weightHow strong is the published human science?
Sourcing & COA
30% weightOur moatCan a buyer obtain an independently-verified, high-purity version? — our proprietary layer.
Safety & Risk
25% weightWhat is the real-world harm potential?
Practicality
10% weightHow easy is it to actually run a verified version?
Sources & Citations
Every claim cites a primary source. Citations are machine-audited against NCBI — see methodology.
Best-Sourced Vendor
Limitless Life Nootropics
Vendor 84 · AStrong vendor grade (A) and the best verified supply right now for IGF-1 LR3 — batch-matched independent COA freshness 40%.
Visit Limitless Life Nootropics ↗Ranked by Source Match = Vendor Grade × batch-COA freshness. Affiliate status is never an input to any grade, and a paying vendor never outranks a non-paying one on a tie.How this works →
Educational only — not medical advice. PepScore is an educational research grade, not a prescription or dosing recommendation. Some vendor links are affiliate links — this never affects grades. Consult a licensed healthcare provider before using any compound.